 The series is set in a near future (roughly several decades into the 21st century) where ozone layer damage has forced all air travel to be abandoned (except for some airships), while the world is now spanned by an interconnected mega-motorway system called C3C.At the same time, global cooling has intensified, and large areas of the globe are covered in snow, inhospitable and difficult to cross, but also allowing land connections via the northern arctic.This stylistic tool allows the series to imagine a globalized future world where it still takes weeks to travel from one point to another, and where private truckers and megacorporations compete (and sometimes fight) over lucrative freight.